JPH05506808A - intermediate stage separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] intermediate stage separator The invention generally relates to high temperature polymer particles, such as hot rubber crumbs. From the first stage air flow, which is warm and humid (hereinafter referred to as humid), to the dry, low temperature air flow. An intermediate stage separator (interarageseplrN) for transfer to the next stage air stream. ar).

A typical process for dewatering and drying rubber particles is using a compressed air conveying system (PNC). uma+ic convBiB t7slem) der). The rubber particles are cooled in this transport system before being transferred to the enclosed Vibration conveyor (enclos!d vibraNng conve7or) up to the fluid bed conveyor (fluidixsd bed conye7o+) transported and released onto it. The rubber particles are then transferred to a vibrating conveyor or fluid conveyor. It is cooled in a conveyor belt to the temperature required for packing or packaging, and then The product is transported to the packing and wrapping area via a series of open-type vibrating conveyors.

The degree to which rubber particles can be cooled in a compressed air transfer system is limited by the saturation temperature of the air and the above mixture in the transfer system. Ru.

Wet and hot air in the compressed air transfer system in an attempt to further cool the rubber particles. When the temperature of the air in the tree is lowered below the saturation temperature, free water (tree vx jar). Therefore, for further cooling, As mentioned above, the rubber particles are placed on a sealed vibrating conveyor or fluid bed conveyor. It is necessary to direct the

Current compressed air transfer systems have cooling limitations that limit the inherent Combined with their eccentric nature, they can lead to defects in system performance and product quality. This is causing a problem. From compressed air conveyors to closed vibrating conveyors or fluid beds. Since the rubber particles entering the conveyor are still hot, these particles coagulate and are compressed. Block equipment downstream of the air conveyor. In addition, the hot rubber mass that caused the blockage , deteriorate, destroy, and contaminate products.

In related prior art, it is known to separate particles from air streams. for example, U.S. Patent No. 4.599, dated July 8, 1986, issued to Medemblik. ．． No. 016 provides a cyclone device for separating particulate matter from an air stream. Ru.

In addition, the product is subjected to a countercurrent reaction of cooling gas (count + - flowing reaction). cjion).

An example of this teaching is given by Beckmann, dated April 10, 1984. ), US Pat. No. 4,441,261. Beckman is a cooling system A scorching hot coke is introduced into the device, in which two cooling gas streams interact with each other at the upper end of the device. Discloses what is to be combined. The device passes through a gas separator near its lower end. A cooling gas flow is provided and directed in a direction opposite to the incoming coke.

Similarly, the US dated December 21, 1982 granted to Saito (Sa Self 0) et al. Patent No. 4.365.057 discloses that nitrogen gas is supplied from the lower part of the dryer. The nitrogen gas flows up the dryer in the opposite direction of the descending hydrocarbon media. Teach the dryer to be dryer.

US Patent Granted to Muller on November 4, 1980 No. 4.231.991 shows a crystallization device receiving granular amorphous material. Ru. Due to gravity, the amorphous material flows back down to the hot gas introduced into the lower part of the device. descend.

No. 4, dated February 19, 1980, issued to Bourne. No. 189.299 discloses a cooling tower for receiving hot lime. low temperature of air is pumped into the cooling tower near the bottom of the tower, passing through the falling lime and upwards. stream and is sucked into a dust separator near the top of the column.

US Patent for Gardner (Ga+dnaer) dated February 28, 1978 No. 4.076,493 discloses an upright structure containing sintered particulate material to be cooled. shell and placed in the lower part of the shell for discharging cooling air into this material. The invention also discloses an air distribution means.

Granted to Davis et al. on November 28, 1971 U.S. Pat. No. 3,629,951 discloses a spray tower with a high A hot air duct leading to an air sump is installed at the lower end of the tower to distribute the warm air. Discloses a spray tower that has been exposed.

United States against Friedtich dated August 9, 1966. Patent No. 3.265.775 is a standpipe and funnel device that A downward intake rotor conduit receives the process gas for upward flow in the pipe. Discloses a standpipe with a cut.

A catalytic gas reaction means is shown in US Pat. No. 2,458,357. This patent was granted to Evans (Ema 5ns) on February 19, 1944. workman Vance exemplifies a reclamation container that confines the contact material. This contact material has recycled Cool air is provided upward and downward within the container.

Granted to Cadet et al. on February 17, 1948 U.S. Pat. No. 2,436,355 discloses a spray system in which hot air is drawn. Showing the drying room. Furthermore, the annular rings at the top and bottom are passed through this drying chamber. supplementary cold air is forced through.

Brief description of the drawing Figure 1 shows an overview of the intermediate stage separator used in the two-stage cooling process for fine rubber particles. FIG.

FIG. 2 is a plan view of the intermediate stage separator.

FIG. 3 is a front cross-sectional view of the preferred embodiment for the intermediate separator and transition member; Ru.

FIG. 4 is a top plan and cross-sectional view of the intermediate stage separator taken along line 4--4 of FIG. This is a diagram that combines the following.

5 is a top plan view of the intermediate stage separator taken along line 5--5 of FIG. 3; FIG.

6 is a top plan view of the transition member taken along line 6--6 of FIG. 3; FIG.

As is clear from the above, before releasing the rubber particles to the packing/wrapping station, This is because fine rubber pieces dried in an elastic polymer drying and cooling system are A process that allows cooling to a temperature lower than that currently achievable in the system. is necessary. Co-pending applications filed by the applicant at the same time as this application are: The hot, water-saturated air stream of the first compressed air conveyor is transferred to the second compressed air conveyor. The above-mentioned objectives can be achieved by a method in which rubber particles are transferred to the low-temperature drying air stream in the Achieving the target.

Once the rubber particles are introduced into the cooled dry air in the second compressed air conveyor, they The particles are further cooled in addition to the cooling they receive in the first compressed air conveyor. actual, The secondary The rubber particles can be cooled in a compressed air conveyor.

The present invention provides a first stage compressed air conveyor containing a hot and humid first stage air flow. The hot rubber particles are transferred to a second compressed air conveyor containing a warm, dry second stage air stream. The object of the present invention is to provide an intermediate stage separator for transporting The present invention focuses on this intermediate stage separation. Achieve the above problem while avoiding coagulation or sticking of fine rubber pieces in the container. Ru.

This invention separates hot rubber particles from a hot, humid first stage air stream and without contaminating the equipment or causing blockage or contamination with products of rubber particles. and to transfer the separated hot rubber fine pieces to the second stage low temperature drying air stream. The present invention relates to an intermediate stage separator.

At its upper end, this intermediate stage separator separates the hot rubber fines from the first stage of hot moisture. A mixture of compressed air (hereinafter referred to as moist air) is received from the first stage compressed air conveyor. including a body member with radial inlets for accommodating nothing. In this body part, high-temperature rubber particles are separated from the first stage airflow by centrifugal force. It is a room. The lower end of the body member forms a solids outlet, and around this solids outlet are secured in spaced relation such that the transition device forms an annular mouth. This annular Dry at a low temperature through a second stage air intake provided in the transition member leading to the opening. Stage air is introduced which exits the solids discharge (separated hot rubber fines). to pick up the rubber particles in the second stage air stream and transfer them to the second stage compressed air conveyor. It is.

The first stage air is exhausted from the intermediate stage separator. The intermediate stage separator is It is now possible to cover it with a jacket for protection.

Preferred embodiment The intermediate stage separator of this invention can be used in conjunction with a two stage first stage for cooling rubber fines. is designed for use.

The process of dehydration and drying of fine rubber particles usually involves using a slurry of fine particles obtained from the desolvation area. (glory) is placed on a dehydration screen, passed through a dehydration screen press, and then , to a drying extruder. The water contained in the rubber is extracted from the dry extruder. As it exits, it becomes water vapor, but this water is prevented from recondensing into dry particles. In order to stop the drying, the air is combined with the air in the rotary cutter provided at the exhaust port of the drying extruder.

This rotary cutter allows fine particles to be ejected into the compressed air transfer system. This is a variable die device.

The degree of cooling of the rubber particles achieved in a compressed air transfer system depends on the The compressed air transfer system is then limited by the saturation temperature of the air. Discharged onto a closed vibrating conveyor or fluid bed conveyor. Usually fluid bedcon Bear is a cyclone separator (c7cloneseparator). rubber fine The strips are further cooled on a vibrating conveyor or fluid bed conveyor to below the packing and packaging temperature. Rejected. The fluid bed conveyor packs and wraps cooled rubber particles. It is often placed in a position where it can be accessed.

As discussed in applicant's co-pending application, the above procedure has certain important features. There are characteristic flaws. The drawback is that there is hot fine particles on the metal surface inside the fluid bed conveyor. cleaning the equipment will correct this situation. Requires excessive personnel and downtime to recover. In addition, the rubber particles Due to the agglomeration of such particulates as a result of agglomeration within the conveyor or fluid bed conveyor. This causes unevenness in the weight of the package. Even more inconvenient is the loose Water buildup and product loss in the exhaust air from the fluid bed conveyor and insufficient cooling of the fine particles in the compressed air conveyor.

The present invention can be used in an enclosed completion process and effectively treats and overcomes the drawbacks listed above. The intermediate stage separator that can be used is taught. This process generally involves dry extruder discharge. A rotary cutter is used that is attached to the spout, and the rotary cutter has a A blower is used to prevent water vapor from recondensing on the dried rubber particles. Air is introduced from the Rubber particles and air are passed from the cutter to the first stage compressed air conditioner. Transferred to Bear. Due to the action of compressed air, rubber particles are transported to the middle stage of the first stage air stream. transported to the separator.

The rubber fines entering the drying extruder generally contain about 5-10% by weight volatile materials.

The rubber and water mixture is extruded by mechanical work just upstream of the extrusion die. It is heated in a container. However, the wet rubber passes through the die plate of the extruder The sudden release of pressure that occurs during this process quickly evaporates the water contained in the rubber. heat is transferred from the rubber to the water and some drying and cooling of the rubber is achieved. extrusion The water that evaporates from the soybeans mixes with the transport air of the first stage compressed air conveyor. The heat is In addition, by utilizing naturally occurring cooling and cooling jackets, the east first stage compressed air is removed from the rubber and air mixture in an air conveyor. These cooling mechanisms together to determine the temperature of the rubber entering the intermediate stage separator.

The degree to which the rubber can be cooled by the first stage compressed air conveyor depends on the saturation of the air and water vapor mixture. Limited by sum temperature.

This limitation is to prevent air saturation and condensation from the air to the rubber. In the first stage, about 6 to about 10% of the water evaporated from the rubber in the extruded soybean The temperature of the air leaving the pneumatic conveyor must be maintained at approximately 45-60°C. It is determined by the condition that there is no.

This two-stage process provides more rubber cooling than can normally be achieved with the first stage compressed air conveyor. make it possible to manifest. This intermediate stage separator connects the east first stage compressed air conveyor. The rubber particles are transferred from the hot, humid first stage air stream to the second stage compressed air conveyor. This is achieved by

The basic operation of this intermediate stage separator involved in cooling fine rubber particles is shown in Figures 1 and 2. It can be best explained by referring to . As seen in these figures, the intermediate stage separator 12 includes a vertically oriented body defining an enclosed separator with an upper end and a lower end.

A first stage intake port 16 facing in the radial direction is provided at the upper end, and a first stage intake port 16 is provided at the lower end. A solid discharge portion 18 is provided in the solid discharge portion 18 . Around the periphery of the lower end, there is a Conical transition members 20 are disposed adjacent and spaced apart. This transition member provided to define an annular opening 22 between the material and the outer surface of the solids outlet. . This transition member is provided with a second stage air intake 24. The first stage intake is The second stage air intake 24 communicates with the first stage compressed air conveyor, and the second stage air intake 24 is connected to the second stage compressed air conveyor. Connect with the source. The upper end of the intermediate stage separator communicates with the exhaust passage 26, and the passage 26 is equipped with a valve. Means 28 are provided.

The hot rubber fine particles are completely absorbed into the first stage hot humid air stream of the first stage compressed air conveyor. While it is completely taken in, it is introduced into the intermediate stage separator 12. This intermediate stage separator In the separation chamber, the rubber particles undergo a downward helical movement in the process of approaching the solid discharge part 18. , in which it is separated from the first stage air. The second stage air intake Bring in cool, dry, fresh air. This low temperature dry air enters the annular opening. When the separated high-temperature rubber particles exit from the solid discharge section of the intermediate separator, this in the second stage air stream to pick up particles and provide further cooling based on the process described above. A second stage compressed air conveyor carries these particles away.

This annular opening allows the low-temperature drying air to be introduced into the annular opening 22. As a result, the holes are opened so that they are evenly distributed within it. As a result, the walls of the transition member The cool dry second stage air with high air velocity along the Stop. Furthermore, the adhesion of rubber particles to the transition member can be prevented by using materials such as Teflon on the transition member. Further prevention can be achieved by applying a non-stick material. Transition member preference Not good This intermediate stage separator is subject to a slight positive pressure. Therefore, in the second stage compressed air conveyor The pressure drop applies back pressure to the intermediate stage separator and is removed from the intermediate stage to the first stage via exhaust passage 26. Forcefully exhaust warm and humid air. This pumping rate is the first stage air input to the intermediate stage separator. It is adjusted by valve means 28 to be below the put speed. intermediate stage separator and The transition member takes out about 99% of the rubber particles and transfers them to the first stage which enters the second stage compression conveyor. Only about 10 to 20% of the air escapes. If the first stage air is sufficiently exhausted If there is insufficient pressure available to A suction device can be provided in the exhaust passage 26 for this purpose.

This intermediate stage separator can be characterized by a vortex.

This vortex causes the first stage air to flow in areas where blockages can occur, usually due to low density. It always flows near the solid discharge part.

Furthermore, the annular opening 22 allows the second stage air to flow around the periphery of the solids discharge portion of this intermediate stage separator. It is specifically designed to evenly distribute the amount of water at a suitable transfer rate.

3 through 6 illustrate preferred embodiments of the present intermediate separator and transition member. It is shown. This intermediate stage separator includes a first body portion with an enclosed upper end 32. A vertically oriented elongated centrifuge chamber defined by a member 30 and a generally circular and a cone-shaped open lower end 34 . This first body member has a separation chamber 35. Determine.

The upper end of this first body member communicated with the first stage compressed air conveyor. A radially oriented first stage intake 36 is provided. The first body member 30 is surrounded by two outer body members 38, the body members 38 as a whole being part of the first body member 38; Extending from the upper end 32 of the member 30 to the lower end 34 and between the first body member 30 The first body is spaced apart from the member 30 such that a gap 40 is formed between the first body and the member 30. . Body member 38 forms a jacket around first body member 30 . this place In this case, it is provided that cooling means are introduced into the gap 40 from the cooling fluid intake 42. Illustrated.

The lower end 34 of the first body member 30 terminates in a solids discharge portion 44 . See Figure 3. Similarly, the lower end of the body member 38 is aligned with the solid discharge portion 44 so that the body member 38 Terminated by sea urchin. At the lower end of the intermediate separator is a generally conical transition member 46. provided. Referring to FIG. 3, the transition member is spaced apart near the solids discharge. It is understood that the periphery of the lower end of the second external body member should be surrounded while maintaining the relationship Wear. This transition member is therefore positioned such that the second body member surrounds the lower end of the first body member. and a lower end of the second outer body member. This transition member is part of the second body. is spaced apart from the lower end of and defines an annular opening 48 . This transition member communicates with the annular opening 48 and receives a flow of cold, dry air from a suitable air source. A second stage intake 50 is provided. The bottom end 52 of the transition member is the second stage. Designed to communicate with compressed air conveyors.

The top end of the first body member includes an exhaust air conduit having an exhaust passage 54 and a monitoring window 56. It leads to Jit 55. A cooling fluid intake port 62 is provided at the lower end of the exhaust passage for cooling. External (outer) sleeve 58 is evacuated to form a gap 60 for receiving fluid. in spaced relation to the lower end of the passageway.

The transition member is spaced apart from the lower portion of the first body member and the second outer body member. The transition member and the second external bolt are connected in spaced relation by fixed flanges 64, respectively. The device is fixed to the lower part of the member.

a lower end of the first body member and a second outer body member increasing the size of the annular opening 48; A standoff member is provided between these fixed flanges to lower the transition member relative to the member. It is now possible to

This intermediate stage separator allows cooling and drying without clogging the equipment with hot sticky rubber. The high temperature rubber is transferred from the first stage compressed air conveyor to the second stage compressed air conveyor by stage air. Successfully transport particles. As mentioned above, the first stage height of the first stage compressed air conveyor Rubber fine particles taken into the humidified air separate the rubber particles from the first stage air. is routed from the radial intake to the separation chamber of the intermediate separator. . Cool, dry second stage air is introduced into the annular opening 48 from the second stage intake; As the rubber particles exit the solid discharge section, they are separated and picked up. Transfer to a second compressed air conveyor in a cool dry second stage air stream. This first stage Air is drawn from the intermediate stage separator through an exhaust passage. Second stage compressed air conveyor The pressure drop in the tank puts back pressure on the intermediate stage separator, which forces the first stage air into the exhaust passage. be forcibly evicted from This exhaust speed is kept below the second stage air intake speed by a valve. It is designed to be regulated with a valve to If the available pressure is A suction device can be included in the exhaust passageway if it is insufficient to force the air out.

The temperature characteristics of this intermediate stage separator are such that a certain part of the first stage air discharges solids to prevent blockage. Ensure regular movement around the area. In addition, the transition member Due to the high velocity of the second stage air, there is no tendency to cause blockages.

When the pumping speed is high, the rubber velocity is very low at the solid discharge section, so high temperature particles Blockage is a potential problem as children easily stick to the walls of the separator . This problem was designed to be overcome by the cooling effect provided by the cooling fluid. It was. Therefore, the present invention does not include any moving parts that cause blockages, and reduces the cause of blockages. The rubber particles are always kept in motion.

The second stage transfer air flow rate is sufficient if the particles can be transferred by compressed air. First stage and the efficiency of maintaining the second stage fluid stream in separation depends on the fluid flow rate and the size of the device. Dependent.

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Flθ? FIG 3゜ FIG4゜ Summary book A first stage compressed air conveyor with hot humid air is supplied with cold dry air. Provided with an intermediate stage separator to transfer the polymer fines to the second stage compressed air conveyor. Ru.

The present intermediate separator 12 has a radial inlet 16 for the fines and a radially oriented inlet 16 for the fines. an enclosed separation chamber in which the pieces are separated from the first stage air flow; . A transition member 20 associated with the separator directs the fines into the second stage air stream. , and then directed to a second stage compressed air conveyor. This intermediate stage separator is related equipment (transferring the polymer particles from the first stage air flow to the second stage air flow) without causing blockage of the air flow. send

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Claims (1)

[Claims] 1. Polymer fine particles are removed from the first stage compressed air conveyor with a first moist and high temperature air flow. While receiving the pieces, the polymeric fines are removed from the moist and hot first stage air stream. Intermediate section of a two-stage compressed air conveyor for transfer to the dry, cool second-stage air stream In the separator, a vertically oriented body member having an upper end and a lower end is used. - member defines an enclosed separation chamber such that the separation chamber receives positive pressure. body parts, A radial inlet provided at the upper end allows the polymeric microstripes and the first directing the moist and hot air from a stage compressed air conveyor into the separation chamber; , in which the polymeric particles are separated from the moist and hot first stage air in the separation chamber. a radial intake adapted to be separated; the separated polymeric particles are ejected from the lower end of the body member; a solid discharge portion at the lower end; the body portion for exhausting the moist and hot first stage air from the separation chamber; Exhaust means provided at the upper end of the material; a conically shaped transition member surrounding the lower end of the body member; the transfer member in a spaced relationship from the lower end to define an annular opening therebetween; disposed and fixed relative to the body member and adapted to change the size of the annular opening; a transition member adapted to allow the transition member to be raised or worked relative to a lower end; a second stage air intake provided in the transition member, communicating with the annular opening and supplying the dry air; and is in communication with a source of dry cooling air to direct the dry cool second stage air to the annular tube. a second stage air intake adapted to be introduced into the opening; including; The annular opening distributes the dry, cool second stage air evenly within the transition member. Re, The dry, low-temperature second stage air collects the separated polymer fine particles discharged from the solid discharge section. and the transition member picks up the separated high temperature in the dry, cold second stage air stream. and adapted to direct molecular microspheres to the second stage compressed air conveyor. An intermediate stage separator characterized by: 2. In the intermediate stage separator according to claim 1, the size of the annular opening is variable. An intermediate stage separator characterized by: 3. The intermediate stage separator according to claim 1 further comprising: and a valve means configured to control the exhaust rate of the first stage air from the separation chamber. An intermediate stage separator characterized in that it is adapted to adjust. 4. The intermediate stage separator according to claim 1, wherein the body member is a cyclone separator. An intermediate stage separator comprising: 5. The intermediate stage separator according to claim 1, wherein the transition member is provided with an anti-occlusion coating. An intermediate stage separator characterized by: 6. In the intermediate stage separator according to claim 1, about 99% of the fine particles are in the solid discharge. An intermediate stage separator characterized in that the discharge occurs from the 7. In the intermediate stage separator according to claim 1, about 90% of the first stage air is An intermediate stage separator characterized in that it is separated from the fine particles within a chamber. 8. The intermediate stage separator according to claim 1, further operatively associated with the exhaust means. valve means, said valve means regulating said first stage air exhaust rate from said separation chamber; An intermediate stage separator characterized in that: 9. High temperature rubber powder from a first stage compressed air conveyor with a first moist and hot air stream. While receiving the strips, the hot rubber particles are removed from the wet and hot first stage air stream. , an intermediate stage separation that transfers to the dry, cool second stage air stream of the second stage compressed air conveyor. In the vessel, A cyclone having an upper end and a lower end defining a generally closed separation chamber a cyclone separator, the separation chamber being subjected to positive pressure; and defining a space between the external body member and the cyclone separator. The cyclone separator is separated by an external body member disposed in spaced relationship with the cyclone separator. a lon separator is generally enclosed, and the outer body member has a small At least one cooling fluid inlet is provided, the cooling fluid inlet connecting to the air. the cyclone separator adapted to introduce a cooling fluid therebetween; A radial inlet is provided at the upper end, and the inlet is connected to the high temperature rubber fine pieces. and directing the moist and hot air from the first stage compressed air conveyor to the separation chamber. the hot rubber particles are directed into the wet and wet rubber particles within the separation chamber. a radial intake adapted to be separated from the hot first stage air; and a radial intake adapted to be separated from the hot first stage air; the heated rubber particles are discharged from the lower end of the cyclone separator. a solid discharge portion at the lower end; the cyclone separator for exhausting the moist and hot first stage air; Exhaust means provided at the upper end of the Chron separator; a conical shape surrounding the outer body member at the lower end of the cyclone separator; a transition member defining an annular opening between the outer body member and the transition member; The transition member is positioned and secured in spaced relation to the external body member, and the transition member a transfer member is raised relative to the outer body member so as to change the size of the annular opening; or a transition member provided within the transition member and capable of lowering the annular shape. A second stage air intake leading to the opening communicates with the dry cooling air and cools the drying air. a second stage air intake adapted to introduce cold second stage air into the annular opening; including; The annular opening distributes the dry, cool second stage air evenly within the transition member. Re, The dry, cool second stage air flow provides second stage air that is constantly moving within the transition member. such that the dry, low temperature second stage air stream discharges from the solids discharge from the separation It is made to pick up fine pieces of high-temperature rubber, The transition member transfers the separated hot rubber particles in the dry, cold second stage air stream to the second stage. is directed towards a compressed air conveyor An intermediate stage separator characterized by: 10. The intermediate stage separator according to claim 9, wherein the exhaust means an enclosed exhaust passage communicating with the upper end of the vessel, the enclosed exhaust passage including the exhaust passage; an outer sleeve spaced apart from the sleeve and the exhaust passageway; an intake port is provided in the sleeve, and the intake port is provided to define a space therebetween; The port is adapted to introduce cooling fluid into the space between the sleeve and the exhaust passage. There is An intermediate stage separator characterized by: 11. The intermediate stage separator according to claim 9, wherein the transition member is a pair of associated fixed flanges, one of the flanges being fixed to the provided on the external body member, the other of the flanges being provided on the transition member; is being An intermediate stage separator characterized by: 12. In the intermediate stage separator according to claim 11, the the means for raising or lowering the transition member includes at least one spacing member; A medium characterized in that a spacing member is arranged between the fixed flanges. Interstage separator.